Question

Solve for x and y: 7y−5x=31 & x=4−2y

Answer 1

7*y - 5*(4-2y) = 7y - 20 +10y = 17y-20 = 31,

y =3, x = -2.

Weird 20 min without answer!

Answer 2

Y =3 x=-2 hope it helps